If you wanted to share what was happening at an event or simply report from vacation, you have an option.
WordPress has a great support page to help you get started with your first Post by Voice.

Here are steps in brief to get started:
1. Enable Post by Voice – Go to Dashboard, then My Blogs and select the blog you want use.
2. Select enable and a phone number and secret code will be generated.
3. Call the phone number listed on My Blogs screen and enter the secret code.
Note: You can use the Regenerate link to create secret code for security.
4. WordPress will hand the rest!